2022 JLAB REVIEW

2022 C1 Status Review of Tensor Spin Observables Experiments

Request to remove the C1 conditional to the b1 and Azz experiments

The b1 and Azz collaborations ask the PAC 50 to remove the conditional from the experiments under the statement: Recent developments in spin 1 enhanced tensor polarization have shown that a tensor polarization of at least (close to) 30% will be achieved under experimental conditions.

Supporting document.

NMR measurement of tensor enhancement maximized by using two locations of ss-RF while rotating continuously at a fixed rate. The resulting tensor polarization was approximately 36%

Spin 1 Target Development

Modeling alignment enhancement for solid polarized targets	https://arxiv.org/abs/1707.07065
Enhanced tensor polarization in solid-state targets	https://arxiv.org/abs/2008.09515

PAC Results

Experiment	Title	Scientific Rate	PAC Decision	PAC Results	Condition
b1	The Deuteron Tensor Structure Function b1	A-	C1	https://www.jlab.org/exp_prog/PACpage/PAC40/PAC40_Final_Report.pdf	The experiment is conditionally approved with the condition that a tensor polarization of at least 30% be achieved and reliably demonstrated under experimental conditions.
Azz	Measurements of the Quasi-Elastic and Elastic Deuteron Tensor Asymmetries	A-	C1	https://www.jlab.org/exp_prog/PACpage/PAC44/PAC44%20Report_FINAL.pdf	The experiment is conditionally approved with the condition that a tensor polarization of close to 30% be achieved and reliably demonstrated under experimental conditions.

Full Proposals

Experiment	Proposal
b1	https://www.jlab.org/exp_prog/proposals/13/PR12-13-011.pdf
Azz	https://www.jlab.org/exp_prog/proposals/15/PR12-15-005.pdf